The power brake booster has a massive vacuum leak.
a. is the power on? b. have you put your foot on the brake ? c. has the bulb/fuse gone?
In a manual brake system, the pressure from your foot increases the pressure in the brake lines and in the brake cylinders. The clyinders expand and press the brake pad or shoe against the brake friction surface (a drum or a rotor) increasing the friction and causing the wheels to stop or slow. In a power brake system, your foot pressure is enhanced by the power assist on the master cylinder to make stopping easier.
Somebody who "rides" the brake is constantly applying pressure to the brake pedal with their foot. People who tailgate ride their brake alot. "Covering" the brake is a form of defensive driving. For example, while proceeding through a traffic light, you would want to take your foot off of the gas pedal and place it just above the brake pedal (without applying pressure) to decrease your reaction time in case you need to brake suddenly.
For every 1000 ft an normally aspirated engine loses 3% of it's horsepower, 7000 foot would result in a 21% reduction in power.
If you have a manual gearbox you should use neutral AND foot brake at traffic lights. If you have automatic you can leave it in Drive with your foot firmly on the foot brake. (Some instructors would tell you to move it to neutral and keep your foot on the foot brake.)
master cylinder or power booster
The brake booster is what gives you power brakes. In the engine compartment in front of the steering wheel is a round black flat ball looking thing. That's the brake booster with the brake master cylinder attached in front of it. The brake booster uses VACCUM from the engine to multiply the force that your foot applies to the master cylinder. Used with power brake applications
Driving with you left foot on the brake.
The problem that plagued the Audi 5000 was unintended acceleration. This means that the car would jerk forward, like when you suddenly press the gas, when the driver's foot was on the brake.
Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.
Emergency Brake, Parking Brake